127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6

{% for host in groups.master %}
{{ host }} {{ hostvars[host]['node_name'] }}
{% endfor %}
{% for host in groups.slave %}
{{ host }} {{ hostvars[host]['node_name'] }}
{% endfor %}
